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with a friend of his who worked at nasa who's an engineer. and some of them are very straightforward. this was a rod that he used to measure, this is a 10-foot rod which you can see can be moved up and down if you're on bumpy ground. he invented several of these. there's another version of it, figure 2. figure 3 seems to be sort of what's called an escapeman counter so he'd click once and by the end of the year sort of as museum guards do sort of tallying so that he could verify what he had in his notebooks with what was on the counter. this was a very elaborate version of a measuring rod. this is 50 feet long. and it is built for incredible support so that it could stay steady each though it was very heavy and very long. has a foldable version which is figure 5 which you can see, we think, folds in so it would be easier to carry. randel also did tests on these instruments to make sure, to understand how they expanded in certain temperatures, in certain weather conditions. this, again, put him very much in the realm of a gee debtic surveyor. and the 1821 map, which i'll show you in a
Search Results 0 to 0 of about 1